21510103350012 has 24 divisors (see below), whose sum is σ = 51137226833616. Its totient is φ = 7034750780928.

The previous prime is 21510103349983. The next prime is 21510103350031. The reversal of 21510103350012 is 21005330101512.

It is a super-2 number, since 2×21510103350012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16910457973 + ... + 16910459244.

It is an arithmetic number, because the mean of its divisors is an integer number (2130717784734).

Almost surely, 2^{21510103350012} is an apocalyptic number.

It is an amenable number.

21510103350012 is an abundant number, since it is smaller than the sum of its proper divisors (29627123483604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21510103350012 is a wasteful number, since it uses less digits than its factorization.

21510103350012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33820917277 (or 33820917275 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 21510103350012 its reverse (21005330101512), we get a palindrome (42515433451524).

The spelling of 21510103350012 in words is "twenty-one trillion, five hundred ten billion, one hundred three million, three hundred fifty thousand, twelve".